Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7827662 | Device of a descaler head A device of a descaler head is described with circumferentially following and longitudinally following rows of descaler parts (22, 24, 26) where the descaler head comprises: a shaft (12) onto which are fed a number of holding elements for the descaler ... | 11/09/2010 |
| 6422925 | Carbon electrode cleaning system and method The present invention is directed to improved apparatus' for dislodging and abrading cryolite encrustations from carbon anodes spent during aluminum smelting. Both the plow blade and flailing elements of the present invention are constructed and arranged ... | 07/23/2002 |
| 5359748 | Apparatus for cleaning the exterior of a pipe The present invention includes a self-propelled-carriage assembly which is mounted on a pipeline for removing deteriorated coating formed thereon. The self-propelled carriage assembly includes a frame having first and second sections. The first section is... | 11/01/1994 |
| 4912799 | Water main scraper A scraper for use in repairing underground pipe breaks consisting of two parallel chains carrying transverse square scraper rods.... | 04/03/1990 |
| 4750249 | Pipe scraping tool A pipe scraping tool for cleaning scale and other deposits from the exterior surfaces of pipes. The tool includes a plurality of inverted "U"-shaped scraper members each of which is carried by one of a series of interconnected hinged links, each link (pre... | 06/14/1988 |
| 4654938 | Descaler head assembly for a descaling machine Descaler head assembly having peripherally successive and longitudinally successive series of descaler elements (11, 12). The assembly is made up of a central support shaft (15) which is securely threaded through a series of mutually separate, rigid holdi... | 04/07/1987 |
| 4472852 | Carbon electrode cleaning system An electrode cleaning apparatus wherein a carbon electrode is maneuvered between a pair of spaced counterrotating vertical shafts having flailing elements connected thereto. This occurs within an enclosure having a lower hopper that directs flailed residu... | 09/25/1984 |
| 4002491 | Removal of coatings by rotating chain flails Coatings are loosened for removal from various substrates by rotating a chain-like flail against the coating while maintaining the flail oriented and positioned with respect to the surface of the coating so that the next-to-last terminal link of the flail... | 01/11/1977 |
